Since two of the earlier flights had been cancelled because of the weather, it is likely that the pilot was under no pressure from the chief pilot to go ahead with the flight. In consideration of the weather conditions just before departure and the specification on the operator certificate that allowed flying with visibility of at least one mile, the decision to go ahead with the flight can be justified. Yet, although the weather conditions were favourable for visual flight at the time of departure from Tortue Lake, they quickly deteriorated during the approach to Piles Lake. This loss of visibility was consistent with the GFA, which had warned that conditions might deteriorate to the point where visibility was reduced to mile with a ceiling at 300feetAGL. Flying at low altitude in low-visibility conditions is dangerous. Low-altitude flying gives pilots little time to see obstacles and take evasive action. The pilot's decision to turn back was late in coming. The consequence of his failure to act was the loss of visual ground references, and the pilot was unable to avoid striking the mountain right in front of him. Although the pilot did possess the necessary licence and qualifications, it is possible that his lack of experience contributed to his late decision.Analysis Since two of the earlier flights had been cancelled because of the weather, it is likely that the pilot was under no pressure from the chief pilot to go ahead with the flight. In consideration of the weather conditions just before departure and the specification on the operator certificate that allowed flying with visibility of at least one mile, the decision to go ahead with the flight can be justified. Yet, although the weather conditions were favourable for visual flight at the time of departure from Tortue Lake, they quickly deteriorated during the approach to Piles Lake. This loss of visibility was consistent with the GFA, which had warned that conditions might deteriorate to the point where visibility was reduced to mile with a ceiling at 300feetAGL. Flying at low altitude in low-visibility conditions is dangerous. Low-altitude flying gives pilots little time to see obstacles and take evasive action. The pilot's decision to turn back was late in coming. The consequence of his failure to act was the loss of visual ground references, and the pilot was unable to avoid striking the mountain right in front of him. Although the pilot did possess the necessary licence and qualifications, it is possible that his lack of experience contributed to his late decision. The pilot delayed turning back when he encountered adverse weather conditions, which resulted in a loss of visual ground references. On losing his visual ground references, the pilot was unable to avoid striking the mountain right in front of him. The aircraft hit some trees before nosing over and ending up on its back.Findings as to Causes and Contributing Factors The pilot delayed turning back when he encountered adverse weather conditions, which resulted in a loss of visual ground references. On losing his visual ground references, the pilot was unable to avoid striking the mountain right in front of him. The aircraft hit some trees before nosing over and ending up on its back.